{"term":{"id":"08024","title":"linearity of calibration","longtitle":"IUPAC Gold Book - linearity of calibration","doi":"10.1351\/goldbook.08024","code":"08024","status":"current","synonym":"<em>synonym<\/em>: calibration linearity","definitions":[{"id":1,"text":"Closeness of agreement between indications obtained using calibrators in the first step of a calibration and indications predicted by the calibration function for the calibrators’ reference quantity values.","notes":{"1":"The concept applies to calibration functions of any mathematical form. The term \"linearity\" is historical and refers to a time when calibration graphs were constructed on paper and were invariably considered to be linear.","2":"Linearity of calibration may be expressed by measures of agreement (for example, correlation coefficient) or deviation (for example, standard error of regression), obtained by regression of calibration data or assessed from a residual plot.","3":"Linearity of calibration is assessed during procedure validation.","4":"Calibration linearity should not be confused with linearity of a measuring system."},"links":[{"term":"linearity of a measuring system","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08023"},{"term":"procedure validation","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08097"}],"sources":["PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1008 (https:\/\/doi.org\/10.1515\/pac-2019-0819)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08024\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08024\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08024\/plain"},"citation":"Citation: 'linearity of calibration' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.08024","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-04-18T20:47:11+00:00"}}